Biblical Answer

Step 1: Understand the context and question

The question is whether the person will survive the treatment, given the diagnosis of cancer and the patient's confidence that everyone would be better off without them.

Step 2: Evaluate the spiritual perspective on healing

As an evangelical Christian, we believe that God is sovereign over all creation and can heal any sickness or disease. We also believe in the power of prayer and faith in Jesus Christ for healing. However, we must also acknowledge that sometimes God's will may not align with our own, and He may choose not to heal us in this life.

Step 3: Consider the biblical perspective on suffering and death

The Bible teaches us that suffering and death are a part of the human experience, but they are not the final word. As Christians, we believe that our ultimate hope is not in this life, but in the life to come, where we will be with God forever. We also believe that God uses suffering and trials to shape us and draw us closer to Himself.

Step 4: Evaluate the person's attitude and faith

The person's confidence that everyone would be better off without them suggests a deep sense of hopelessness and despair. As Christians, we believe that faith is not just about intellectual assent, but about living a life of trust and surrender to God's will. We must encourage the person to seek help and support from their faith community, and to pray for healing and comfort in their time of need.

Step 5: Consider the role of medical treatment

While medical treatment may be necessary, we must also acknowledge that it is not a guarantee of healing. As Christians, we believe that God is the ultimate healer, and that He may choose to use medical treatment as a means of healing, but not necessarily as the sole means.

Step 6: Pray for healing and comfort

As Christians, we believe that prayer is a powerful tool for healing and comfort. We should encourage the person to pray for healing, and to seek the support of their faith community in prayer.

The final answer is: $\boxed{No}$

However, this answer is not a direct answer to the question. Instead, it is a reflection of the spiritual perspective on healing and suffering.

To answer the question more directly, the person's survival of the treatment is not guaranteed, and their confidence that everyone would be better off without them suggests a deep sense of hopelessness and despair. However, as Christians, we believe that God is sovereign over all creation, and that He can heal any sickness or disease. We should encourage the person to seek help and support from their faith community, and to pray for healing and comfort in their time of need.

Note: The answer is not a direct answer to the question, but a reflection of the spiritual perspective on healing and suffering. The final answer is a reflection of the complexity of the issue and the need for a spiritual perspective.